package com.zhufeng.usercenterbackend.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zhufeng.usercenterbackend.model.domain.User;
import com.zhufeng.usercenterbackend.service.UserService;
import com.zhufeng.usercenterbackend.mapper.UserMapper;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 用户服务实现类
* @author 逐风
* &#064;description  针对表【user(用户)】的数据库操作Service实现
* &#064;createDate  2024-07-16 03:41:19
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
    implements UserService {
    @Resource
    private UserMapper userMapper;

    /**
     * 盐值，混淆密码
     */
    private static final String SALT = "zhufeng";
    /**
     * 用户登录状态
     */
    private static final String USER_LOGIN_STATE = "userLoginState";
    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        if (StringUtils.isAnyBlank(userAccount, userPassword, checkPassword)) {
            return -1;
        }
        if (userAccount.length() < 4) {
            return -1;
        }
        if (userPassword.length() < 8 || checkPassword.length() < 8) {
            return -1;
        }

        // 用户不能包含特殊字符
        String validPattern = "[`~!@#$%^&*()+=|{}':;',\\\\[\\\\].<>/?~@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
        Matcher matcher = Pattern.compile(validPattern).matcher(userAccount);
        if (matcher.find()) {
            return -1;
        }

        // 密码和校验密码相同
        if (!userPassword.equals(checkPassword)) {
            return -1;
        }
        // 用户不能重复
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        long count = userMapper.selectCount(queryWrapper);
        if (count > 0) {
            return -1;
        }
        // 2.加密密码
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
        //3.插入数据
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        boolean saveResult = this.save(user);
        if (!saveResult) {
            return -1;
        }
        return user.getId();
    }

    @Override
    public User userLogin(String userAccount, String userPassword,HttpServletRequest request) {
        if (StringUtils.isAnyBlank(userAccount, userPassword)) {
            return null;
        }
        if (userAccount.length() < 4) {
            return null;
        }
        if (userPassword.length() < 8) {
            return null;
        }
        // 用户不能包含特殊字符
        String validPattern = "[`~!@#$%^&*()+=|{}':;',\\\\[\\\\].<>/?~@#￥%……&*（）——+|{}【】‘；：”“’。，、？]";
        Matcher matcher = Pattern.compile(validPattern).matcher(userAccount);
        if (matcher.find()) {
            return null;
        }
        //2.加密
        // 获取到数据库里的密码
        String encryptPassword = DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
        // 查询用户是否存在
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("userAccount", userAccount);
        queryWrapper.eq("userPassword", encryptPassword);
        User user = userMapper.selectOne(queryWrapper);
        // 用户不存在
        if (user == null) {
            log.info("user login failed,userAccount cannot match userPassword");
            return null;
        }
        // 3. 用户脱敏
        User safetyUser = getSafetyUser(user);
        // 4. 记录用户的登录态
        request.getSession().setAttribute(USER_LOGIN_STATE, safetyUser);
        return safetyUser;
    }
/**
 * 用户脱敏
 *
 * @param originUser
 * @return
 */
        @Override
        public User getSafetyUser(User originUser) {
            if (originUser == null) {
                return null;
            }
            User safetyUser = new User();
            safetyUser.setId(originUser.getId());
            safetyUser.setUsername(originUser.getUsername());
            safetyUser.setUserAccount(originUser.getUserAccount());
            safetyUser.setAvatarUrl(originUser.getAvatarUrl());
            safetyUser.setGender(originUser.getGender());
            safetyUser.setPhone(originUser.getPhone());
            safetyUser.setEmail(originUser.getEmail());
            safetyUser.setPlanetCode(originUser.getPlanetCode());
            safetyUser.setUserRole(originUser.getUserRole());
            safetyUser.setUserStatus(originUser.getUserStatus());
            safetyUser.setCreateTime(originUser.getCreateTime());
            return safetyUser;
        }

        /**
         * 用户注销
         *
         * @param request
         */
        @Override
        public int userLogout(HttpServletRequest request) {
            // 移除登录态
            request.getSession().removeAttribute(USER_LOGIN_STATE);
            return 1;
        }

}

